MCQ | Digital Computer Organisation Part 1

Digital Computer Organisation - PART 1

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1. The number of bit in ASCII code is:

A. 7
B. 8
C. 4
D. 16

  [BU BHOPAL-2009]

Answer: A - 7

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2. The number of Flip flops needed for a Mod 7 counter are:

A. 7
B. 5
C. 3
D. 1

  [BU BHOPAL-2009]

Answer: C - 3

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3. The density of dynamic RAM is:

A. The same as static RAM
B. Less than that of static RAM
C. More than that of static RAM
D. Either equal or less than that of static RAM

  [BU BHOPAL-2009]

Answer: C - More than that of static RAM

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4. Which method is efficient for data transfer scheme:

A. Programmed I/O
B. Interrupt driven I/O
C. Direct memory access
D. None of the above

  [BU BHOPAL-2009]

Answer: C - Direct memory access

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5. The Five flages in 8085 are designed as:

A. Z,CY,S,P and AC
B. D,Z,S,P,AC
C. Z,C,S,P,AC
D. Z,CY,S,D,AC

  [BU BHOPAL-2009]

Answer: C - Z,C,S,P,AC

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6. The most commonly used number system in computer is:

A. Binary Number System
B. Octal Number System
C. Decimal Number System
D. Hexadecimal Number System

  [BU BHOPAL-2010]

Answer: A - Binary Number System

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7. Let X and Y be inputs and Z be the output of a NAND gate.The value of Z is given by:

A. X+Y
B. X.Y
C. (X.Y)^'
D. X^'.Y^'

  [BU BHOPAL-2010]

Answer: C - (X.Y)^'

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8. Memory is made up of:

A. Set of wires
B. Set of circuits
C. Large number of cells
D. All the above

  [BU BHOPAL-2010]

Answer: C - Large number of cells

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9. Which of the following transmission system provides the highest data rate to an individual device?

A. Digital PBX
B. Computer Bus
C. LAN
D. Voice band modem

  [BU BHOPAL-2010]

Answer: B - Computer Bus

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10. In which addressing mode the effective address of the operand is generated by adding a constant value of the constants of a register?

A. Absolute mode
B. In directed mode
C. Immediate mode
D. Index mode

  [BU BHOPAL-2010]

Answer: D - Index mode

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