List of practice Questions

Consider a 9-bit representation. Which of the following correctly gives the smallest number that can be represented in: (i) 1's complement, (ii) 2's complement?

In 8-bit two's complement arithmetic, compute the result of the following addition: \( A = 10011001 \), \( B = 11010111 \). What is the resulting 8-bit binary value?

Consider the Boolean expression \( X = (A + B). C \) over two Boolean variables A and B. Which one of the following Boolean expressions is equivalent to the given Boolean expression X?

Consider the Boolean function in a CPU control unit: \[ Y = (A + B . C') . (A . B + C) \] Which of the following is the correct simplified expression for \( Y \)?

In an instruction execution pipeline, the earliest that the instruction TLB and data TLB can be accessed are:

Dynamic RAM (DRAM) stores each bit of data in a separate capacitor. Due to leakage, the stored charge tends to dissipate over time and needs to be refreshed periodically. Consider the following statements: \[\begin{array}{rl} \bullet & \text{P: DRAM requires refreshing because it uses capacitors to store bits.} \\ \bullet & \text{Q: SRAM does not require refreshing because it uses flip-flops instead of capacitors.} \\ \bullet & \text{R: DRAM is faster than SRAM because it needs less frequent access.} \\ \bullet & \text{S: DRAM is more suitable for main memory than SRAM due to its density.} \\ \end{array}\]

Which of the following statements about ASCII and Unicode is correct?

In computer architecture, which of the following correctly matches the fundamental unit used in the CPU, cache, and main memory respectively?

A group of 630 children is arranged in rows for a group photograph. Each row contains three fewer children than the row in front of it. What number of rows is not possible?

The percentage change in area of a rectangle by decreasing its length and increasing its breadth by 5% is:

Statements:
I. The meteorological department predicts deficient rainfall during monsoon season.
II. The GDP growth estimates have been revised downwards by the government.
Choose the correct option.

What comes next in the sequence?
2, 6, 12, 20, 30, ______

Which number replaces the question mark?
4, 9, 16, 25, ?, 49

Which number replaces the question mark? \[ 3, 6, 18, 72, ?, 432 \]

A monkey climbs 30 feet at the beginning of each hour and rests for a while when it slips back 20 feet before it again starts climbing at the beginning of the next hour. If he begins his ascent at 8:00 am, at what time will he first touch a flag at 120 feet from the ground?

Four people (P, Q, R & S) are standing in a queue. Q is ahead of P. R is between P and S. If 5 is at the end of the queue, who is at the front of the queue?

If 1st January 2022 was a Saturday, what day of the week will 1st January 2023 be?

A person walks 8 km north, turns right, walks 4 km, turns right again and walks 6 km. Finally, he turns left and walks 3 km. How far is he from the starting point?

If a number is increased by 30% and then decreased by 20%, what is the net change?