Computer — All MCQs

4795 questions available

Showing 3581–3600 of 4795

Q3581.Which of the following is an employee "Physics" stored in database then which option is correct regarding absolute domains of databases?

Easy
A This name does not satisfy semantic description of "Name" attribute
B This name satisfies the semantic description of "Name" attribute
C This is a valid name shared in database
D None of these
Computer Terminology PPSC

Correct Answer: A

In databases, semantic constraints specify expected attribute meaning; storing a school subject name ('Physics') under an employee's personal name attribute violates these constraints.

Q3582.Which of the following unit is used to increase bandwidth of analog signal?

Easy
A Hertz
B Amplitude
C Bytes per second
D None of these
General MCQs PPSC

Correct Answer: A

Hertz (Hz) is the unit of frequency used to specify the bandwidth of analog signals, representing the range of cycle frequencies.

Q3583.Which of the following is the correct statement to print a string in C programming?

Easy
A cout << "I am a student";
B print("I am a student");
C printf("I am a student");
D None of these
Computer Basics PPSC

Correct Answer: C

The standard library function used to output strings on the console in C programming is printf().

Q3584.If you want to display one of the cheapest and most affective network architecture in a building then which of the following network architecture you will apply?

Easy
A Point-to-Point Network
B Client-Server Network
C Peer-to-Peer Network
D None of these
Computer Networks PPSC

Correct Answer: C

Peer-to-peer (P2P) network architectures do not require an expensive dedicated central server, making them cheap and effective for small offices.

Q3585.Which option in the following best explains Signals with reference to Linux Interprocess Communication (LPC)?

Easy
A Signals are asynchronous messages sent to a process
B Signals provide communication with external devices
C Signals eliminate the page faults in operating system
D None of these
Computer Terminology PPSC

Correct Answer: A

In Linux systems programming, a signal is an asynchronous system notification sent to a running process to report an event.

Q3586.What does the getche() function do in C/C++?

Easy
A It will display the character on the screen that user has entered
B It reads a character from the keyboard without displaying it on the screen
C It reads a string from the user
D None of these
Computer Terminology PPSC

Correct Answer: A

The getche() function reads a single keystroke immediately and echoes (displays) the character on the console screen.

Q3587.Consider a laser printer task on a network. This printer cannot be taken away from one process to another process in the middle of printing job. This scenario is called _____?

Easy
A Semaphore
B Non-preemptive resource
C Preemptive resource
D None of these
Computer Networks PPSC

Correct Answer: B

A non-preemptive resource is one that cannot be forcibly taken away from its current process until it is voluntarily released.

Q3588.If you have to remove some error from PROM (Programmable Read-Only Memory), which of the following technique you will use?

Easy
A Errors cannot be removed from PROM.
B Format the PROM.
C Turn off and restart the computer.
D None of these
Computer Basics PPSC

Correct Answer: A

Because Programmable Read-Only Memory (PROM) can only be flashed and written to once, any encountered program errors cannot be removed.

Q3589.If ASCII code of a = 97, what will be ASCII code for y?

Easy
A 116
B 117
C 121
D None of these
General MCQs PPSC

Correct Answer: C

In the ASCII alphabetical index, 'a' is 97. The letter 'y' is 24 positions after 'a', so its code is 97 + 24 = 121.

Q3590.Which of the following is/are an example of a Procedural programming language?

Easy
A FORTRAN
B C
C Pascal
D All of these
Computer Terminology PPSC

Correct Answer: D

C, FORTRAN, and Pascal are classic examples of procedural (imperative, third-generation) programming languages.

Q3591.Normally boot sector virus is typically attached with _____?

Easy
A WinZip files
B .obj files
C .exe files
D None of these
Computer Security PPSC

Correct Answer: C

Boot sector viruses are frequently transported or propagated through executable installer files, such as .exe files, which run code during execution.

Q3592.Which of the following is a drawback of using a batch processing system?

Easy
A Individual time slots are allocated to each task of CPU.
B Undesired commands increase CPU speed.
C Undesired commands are executed by the CPU.
D None of these
Computer Basics PPSC

Correct Answer: C

Because batch systems run programs sequentially without interactive user oversight, any erroneous or undesired commands in the batch are executed unconditionally.

Q3593.If you want to perform mathematical calculations whose value is an integer and is greater than 66.000 then which of the following data type you will use for storing numbers?

Easy
A Short Integer
B Float
C None of these
D None of these
Computer Networks PPSC

Correct Answer: C

Because standard short integers cannot exceed 32,767 in 16-bit encoding, you must use standard/long integers (None of these).

Q3594.If you you use Star Topology in your office, then which of the following is the main advantage of using this topology?

Easy
A A single computer failure does not bring down the whole network.
B It required connections with a hub.
C It is more expensive network
D None of these
Computer Networks PPSC

Correct Answer: A

The primary advantage of a Star network topology is fault isolation; because each device is wired to the central hub independently, a single computer crash doesn't disable other computers.

Q3595.What is one use of a Report generated with reference to DBMS?

Easy
A It is used to manipulate relational database
B It provides an on screen document from the database
C It is used to execute SQL query
D None of these
Computer Terminology PPSC

Correct Answer: B

In database systems, a Report compiles, formats, and displays database records as a structured, readable on-screen or printable document.

Q3596.Which of the following is an example of a transmission medium?

Easy
A LED TV
B Video Camera
C Satellite System
D None of these
General MCQs PPSC

Correct Answer: C

A transmission medium is the physical or logical pathway for signals. Satellite systems act as wireless communication pathways.

Q3597.If you open a file in "R+" mode, what does it mean?

Easy
A Opening a file for both reading and writing
B Opening a file for writing only
C Opening a file for reading only
D None of these
General MCQs PPSC

Correct Answer: A

In standard C library file operations, 'r+' mode opens an existing file stream for both reading and writing.

Q3598.What do you understand from Concurrency control in databases?

Easy
A It is a situation in which only one admin can enter data in database.
B It is a situation in which two or more users access the same record simultaneously.
C It is a situation where one user enters data without validation in the database.
D None of these
Computer Terminology PPSC

Correct Answer: B

Concurrency control is a database safety mechanism designed to coordinate and manage simultaneous read/write transactions on the same records by multiple users.

Q3599.If you have to connect various computers of a University then, which of the following network topologies will you use?

Easy
A Local Area Network (LAN)
B Wide Area Network (WAN)
C Interposition Area Network (IAN)
D None of these
Computer Networks PPSC

Correct Answer: A

Local Area Network (LAN) technologies are used to interconnect computers within localized bounds such as university campuses, buildings, or schools.

Q3600.Which of the following is a main advantage of Spooling?

Easy
A Multiple buses can communicate at the same time
B Data transfer speed increases
C CPU is not involved in heavy data transfer
D None of these
Computer Basics PPSC

Correct Answer: C

Spooling (Simultaneous Peripheral Operations On-Line) offloads data transmission streams onto buffer files, minimizing CPU intervention in slow I/O transfers.