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With regard to computer memory, which of the following statement(s) is/are TRUE?  (A) Cache memory is 'volatile' memory. (B) Magnetic memory is 'volatile' memory.  (C) Flash memory is 'volatile' memory. (D) RAM is 'volatile' memory. Choose the correct answer from the option given below:
Consider the following statements in order to perform a write operation into a specified memory location, the MDR and MAR: 1. The word to be stored into the memory location is first loaded by the CPU into MDR. 2. The address of the location into which the word is to be stored is loaded by the CPU into MAR. 3. A write signal is issued by the CPU. Which of the above statements are correct ? 
The maximum harbour depth below lowest low water is generally equal to
(i) loaded draft + 1.2 m when bottom is rock
(ii) loaded draft + 1.8 m when bottom is soft
(iii) loaded draft + 1.2 m when bottom is soft
(iv) loaded draft + 1.8 m when bottom is rock
Consider the following code sequence having five instructions I1 to I5. Each of these instructions has the following format. OP Ri, Rj, Rk Where operation OP is performed on contents of registers Rj and Rk and the result is stored in register Ri I1: ADD R1, R2, R3 I2: MUL R7, R1, R3 I3: SUB R4, R1, R5 I4: ADD R3, R2, R4 I5: MUL R7, R8, R9 Consider the following three statements. S1: There is an anti-dependence between instructions I2 and I5 S2: There is an anti-dependence between instructions I2 and I4 S3: Within an instruction pipeline an anti-dependence always creates one or more stalls Which one of the above statements is/are correct?
A computer which issues instructions in order, has only 2 registers and 3 opcodes ADD, SUB and MOV. Consider 2 different implementations of the following basic block: Case 1   Case 2 t1 = a + b;    t2 = c + d; t2 = c + d;    t3 = e – t2; t3 = e – t2;    t1 = a + b; t4 = t1 – t2;    t4 = t1 – t2;   Assume that all operands are initially in memory. Final value of computation also has to reside in memory. Which one is better in terms of memory and by how many MOV instructions?
Consider evaluating the following expression tree on a machine with load-store Architecture in which memory can be accessed only through load and store instructions. The variables a, b, c, d and e are initially stored in memory. The binary operators used in this expression tree can be evaluated by the machine only when the operands are in registers. The instructions produce result only in a register. If no intermediate results can be stored in memory, what is the minimum number of registers needed to evaluate this expression?
Saurabh is shifting his house. He loaded things on a horse-cart who cannot pull a load heavier than 300kg. He loaded the following weights on the horse-cart. Things loaded Weight A sack of wheat 150kg A sack of rice 55kg Almirah 68kg Water tank 75kg Utensils 20kg Which thing should be removed so that the weight of the load is equal to 300 kg?
Consider a process executing on an operating system that uses demand paging. The average time for a memory access in the system is M units if the corresponding memory page is available in memory, and D units if the memory access causes a page fault. It has been experimental measured that the average time taken for a memory access in the process is X units. Which one of the following is the correct expression for the page fault rate experienced by the process?
Which of the following statement about computer memory are true?  A. Secondary storage is non-volatile storage.  B. Video memory found in graphics cards is volatile memory.  C. Primary memory (RAM) is the fastest form of memory in a computer.  Choose the correct answer from the options given below:
A shared variable x, initialized to zero, is operated on by four concurrent processes W, X, Y, Z as follows. Each of the processes W and X reads x from memory, increments by one, stores it to memory, and then terminates. Each of the processes Y and Z reads x from memory, decrements by two, stores it to memory, and then terminates. Each process before reading x invokes the P operation (i.e., wait) on a counting semaphore S and invokes the V operation (i.e., signal) on the semaphore S after storing x to memory. Semaphore S is initialized to two. What is the maximum possible value of x after all processes complete execution?