Chapter 2 · MCQ Read Mode

Digital Logic and Microprocessor

The binary equivalent of decimal 13 is:

The base (radix) of the hexadecimal number system is:

Which gate is known as a “universal gate”?

The output of an XOR gate is HIGH when:

De Morgan’s theorem states that (A+B)’ equals:

SOP stands for:

A Karnaugh map (K-map) is primarily used to:

A standard Karnaugh map used for simplifying expressions of 4 variables has how many cells?

In a POS expression, individual sum terms are combined by:

NAND and NOR gates are called universal gates because:

A multiplexer with 4 select lines can select among how many inputs?

A demultiplexer performs the opposite function of a:

A decoder with n input lines can produce up to how many output lines?

A priority encoder resolves the situation when:

A half adder can add:

A full adder differs from a half adder because it additionally accepts a:

In 2’s complement arithmetic, subtraction is performed by:

The range of an 8-bit signed number in 2’s complement form is:

In sign-magnitude representation, the MSB represents:

The 1’s complement of the binary number 1010 is:

An SR flip-flop has an invalid (undefined) state when:

A gated (clocked) flip-flop responds to its inputs:

An edge-triggered flip-flop changes state:

The master-slave flip-flop configuration is primarily used to:

A shift register that accepts data serially and outputs it in parallel is called:

In an asynchronous (ripple) counter, the flip-flops are triggered by:

Compared to asynchronous counters, synchronous counters are:

A JK flip-flop with J=K=1 at the active clock edge will:

A D flip-flop transfers its D input to the output:

Ring counters and Johnson counters are typical applications built from:

The part of a microprocessor that performs arithmetic and logic operations is the:

The register that holds the address of the next instruction to be executed is the:

In assembly language, a mnemonic represents:

The three main buses in a microprocessor system are:

A program that converts assembly language into machine code is called a(n):

The accumulator in a microprocessor is primarily used to:

The address bus in a microprocessor is:

Branch (jump) instructions in assembly language are used to:

The word length of a microprocessor refers to:

Data transfer instructions in assembly language typically move data between:

RAM stands for:

Which memory type retains its content even when power is switched off?

In memory-mapped I/O, peripheral devices are:

The PPI (Programmable Peripheral Interface) is primarily used for:

In asynchronous serial transmission, each data character is framed with:

RS232 is a standard primarily used for:

USART stands for:

DMA (Direct Memory Access) allows data transfer between memory and I/O:

Compared to RS232, USB offers:

In synchronous serial transmission, timing is coordinated by:

An interrupt is best described as:

A hardware interrupt is typically triggered by:

A non-maskable interrupt (NMI) is characterized by:

An Interrupt Service Routine (ISR) is:

The interrupt vector table is used to:

When an interrupt occurs, before jumping to the ISR, the processor must first:

At the end of an ISR, a return-from-interrupt instruction is used to:

Compared to polling, using interrupts is generally more efficient because:

A software interrupt is typically triggered by:

Interrupt priority schemes are needed primarily to:

The unit responsible for generating control signals to coordinate CPU operations is the:

In a microprogrammed control unit, control signals are generated from:

An instruction format typically consists of:

The addressing mode in which the operand value is given directly in the instruction is called:

In indirect addressing, the instruction specifies:

RISC architecture is characterized by:

CISC architecture is characterized by:

Pipelining in a CPU improves performance mainly by:

A pipeline hazard that occurs when an instruction depends on the result of a previous, unfinished instruction is called a:

The arithmetic and logic unit (ALU) primarily performs:

How many NOT gates are required to build a 2:1 Multiplexer?

How many 2-input NAND gates are contained in a standard 7400 TTL IC?

In TTL logic, what is the input voltage range for a logic LOW (active LOW level)?

When an invalid BCD code (1010–1111) is detected and auto-corrected, what value is added?

What is the terminal (reset) state of a MOD-10 (decade) counter?

What is the minimum number of flip-flops (memory blocks) required to build a MOD-6 ripple counter?

An SR flip-flop is also called a:

A JK flip-flop with J = 1 and K = 1 is clocked at 20 kHz. What is the output waveform and its frequency?

What is the duty cycle of an ideal astable multivibrator?

Which of the following is NOT a valid operation of flip-flops?

The TRAP interrupt in 8085 microprocessor is:

Small-Scale Integration (SSI) refers to ICs with how many transistors?

In VHDL, a signal that represents a bus (multi-bit connection) is declared as:

In VHDL, the primary design unit that represents a hardware block's interface (ports and generics) is called:

The shadow mask technique is used in:

Left-shifting an unsigned binary number by 1 bit is equivalent to:

The expression x << 3 is equivalent to:

Which logic gate is commonly used for parity checking and overflow detection?