Computer — All MCQs
4795 questions available
Q3541.In relational terminology, an attribute is also called _____?
Correct Answer: C
In relational database theory, columns are termed attributes or fields, while rows are termed tuples or records.
Q3542.In which topology each node in device connecting to the central computer?
Correct Answer: C
In a Star topology, all network nodes and terminal devices are directly wired to a central computer, hub, or switch.
Q3543.In which topology each of the network computer and other devices are interconnected with one another?
Correct Answer: C
In a Mesh network topology, every computer and network device is directly interconnected to every other node.
Q3544.Which is a chip that can the erased and reprogrammed on the motherboard?
Correct Answer: A
EEPROM (Electrically Erasable Programmable Read-Only Memory) can be electrically erased and reprogrammed byte-by-byte while installed.
Q3545.The laser printer uses ______ for printing.
Correct Answer: B
A laser printer utilizes a high-precision laser beam and static electricity to transfer dry toner powder onto the page.
Q3546.The operation of arithmetic logic unit is directed by _____?
Correct Answer: A
The Control Unit (CU) coordinates and directs the data-processing operations of the Arithmetic Logic Unit (ALU).
Q3547.CPU includes all of the following components expect?
Correct Answer: D
The CPU contains the ALU, Control Unit, and high-speed registers, but primary storage (RAM/ROM) is external to the core processor chip.
Q3548.The _____ is also known as selection statement.
Correct Answer: A
The switch (or if-else) statement is classified as a selection statement because it selects a single execution path from several.
Q3549.Which is a small memory device available in the CPU to store data temporarily?
Correct Answer: C
Registers are tiny, ultra-high-speed memory storage cells integrated directly inside the CPU to hold temporary values.
Q3550.Which of the following is not a function of media regulatory authority bodies?
Correct Answer: B
Broad media regulatory frameworks do not support blanket bans of entire international movies regardless of their specific thematic content.
Q3551.Which of the following is a smartphone brand?
Correct Answer: C
The iPhone represents a world-famous, proprietary smartphone brand engineered and sold by Apple Inc.
Q3552.Which feature ensures that messages on social media are secure and can only be read by the sender and receiver?
Correct Answer: B
End-to-end encryption (E2EE) ensures that data is encrypted on the sender's device and can only be decrypted by the final recipient.
Q3553.What is the purpose of using wireless cellphone systems in agencies for security communication?
Correct Answer: B
Secure wireless systems protect the transmission from wiretapping and keep communications and locations confidential.
Q3554.Agencies use what for transmission of communication?
Correct Answer: C
Wireless transmission provides critical mobility, rapid deployment, and flexibility for security and investigative agency operations.
Q3555.The candidate key that is not selected as primary key is known as _____?
Correct Answer: C
Any candidate key (a column that uniquely identifies rows) not chosen as the primary key of a table is referred to as an alternate key.
Q3556.In DBMS _____ level is closest to the physical storage.
Correct Answer: B
Under the three-schema DBMS architecture, the internal (physical) schema level is closest to the physical storage device.
Q3557.There are _____ basic logic gates.
Correct Answer: B
There are 7 fundamental digital logic gates: AND, OR, NOT, NAND, NOR, XOR, and XNOR.
Q3558.Which of the following is correct SQL query to get records of clerks from EMP table?
Correct Answer: A
SQL uses a single equals sign (=) for comparison inside the WHERE conditional clause.
Q3559.If the variable name is 'age' and the programmer wants to input age, which is the correct syntax?
Correct Answer: C
In C++, the stream extraction operator (>>) is used with the standard input stream object (cin) to store inputs into variables.
Q3560.Which of the following options provides easy entering and editing data in tables of MS Access?
Correct Answer: B
MS Access Forms provide a user-friendly, customizable graphical interface that simplifies entering, modifying, and viewing records in tables.