Computer — All MCQs
4795 questions available
Q3681.In Karnaugh Maps, for simplification _____?
Correct Answer: A
Boolean expression simplification in K-maps is achieved by grouping adjacent cells containing 1s horizontally and vertically in groups of powers of 2.
Q3682.A logic gate that performs logical multiplication is called a ______ gate.
Correct Answer: B
The AND gate performs logical multiplication (conjunction), producing an output of 1 only when all of its inputs are 1.
Q3683.The statement, when used inside the body of a loop, causes termination of the loop without terminating the program is _______?
Correct Answer: C
The break statement terminates the execution of the innermost loop immediately, handing control to the subsequent instructions outside the loop.
Q3684.Suppose z is an integer while z and y are long variables. If you write z = z + y; in your C program, which of the following will happen?
Correct Answer: D
In C, the operands in z + y are promoted to the larger type (long). After addition, the long result is truncated back to int to be assigned back to z.
Q3685.In C programming, the loop that is executed at least once (even if the condition is false) is called ______ loop.
Correct Answer: A
A do-while loop is a post-test loop where the body is executed before checking the condition, ensuring at least one full execution.
Q3686.In C Language, the function getchar() _____?
Correct Answer: B
The standard getchar() function reads a character from stdin. Because stdin is line-buffered, input is held until the user hits the Enter key.
Q3687.Which of the following is TRUE for a variable defined with the keyword const and initialized to a value in C language?
Correct Answer: C
The const modifier makes a variable read-only after initialization, preventing any modification to its value during runtime.
Q3688.Which of the following does NOT qualify to be the name of a variable in C language?
Correct Answer: D
The term 'define' is a reserved preprocessor directive keyword in C and cannot be declared as a custom variable name.
Q3689.In C programming, preprocessor directives start with _____ character.
Correct Answer: C
All preprocessor directives in C (like #include, #define, #ifdef) must begin with the hash (#) symbol at the start of the line.
Q3690.Deep knowledge of the internal structure of a computer hardware is required to write programs in a ______?
Correct Answer: A
Low-level languages (like assembly) require a deep understanding of CPU registers, memory layouts, and machine architectures to program successfully.
Q3691.A set of programs containing instructions to coordinate all the activities of a computer is called ______?
Correct Answer: C
The Operating System is the primary system software package that coordinates hardware resources, runs applications, and provides a platform for users.
Q3692.Loss of energy of a signal as it travels outward is called ______?
Correct Answer: B
Attenuation is the reduction in amplitude or energy level of a signal as it travels through transmission media.
Q3693.A program that controls a particular type of device that is attached to a computer is called ______?
Correct Answer: A
A device driver is specialized system software that enables the operating system to communicate with and control specific physical devices.
Q3694.In a communication system, low Signal-to-Noise means ______?
Correct Answer: A
A low Signal-to-Noise Ratio (SNR) indicates that the background noise level is strong or high relative to the signal strength, causing distortion.
Q3695.Which of the following is NOT a productivity software?
Correct Answer: A
Audio and video players are categorized as media or entertainment applications rather than professional office productivity software.
Q3696.One Gigabyte is equal to ______?
Correct Answer: B
In binary measurement, 1 Gigabyte (GB) is defined as exactly 2^30 bytes (or 1,024 Megabytes).
Q3697.L1 cache is _____?
Correct Answer: C
L1 cache (Level 1) is the fastest cache memory, integrated directly inside the CPU processor silicon for ultra-low latency access.
Q3698.In order to detect movement of the mouse, a mechanical mouse uses a ______ ball.
Correct Answer: C
Mechanical mice utilize a rolling rubber-coated ball that rotates internal rollers to translate physical direction into screen cursor movement.
Q3699.A person who researches problems, plans solutions, recommends software and systems and coordinates development to meet requirements is _____?
Correct Answer: A
A System Analyst is responsible for analyzing business and tech problems, designing system architecture, and organizing development teams to meet requirements.
Q3700.Which of the following is NOT a computer operation?
Correct Answer: B
Computers execute mechanical instructions (input, output, processing, storage) but do not possess independent consciousness or biological 'thinking' abilities.