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Directions to Solve

Each sentences below consist of a word or a phrase which is bold. It is followed by four words or phrases. Select the word or pharse which is closes to the OPPOSITE in meaning of the bold word or phrase.

Q1: The incessant noise of the boring machine made it difficult for us to got to sleep at night.

A soft

B constant

C intermittent

D harsh

Q2:
Can we use a switch statement to switch on strings?

A Yes

B No

Q3: If Vcc of a 555 timer circuit is set to +10 V what is the level of output voltage from the circuit?

A VOH = 10 V, VOL = 0 V

B VOH = 8.5 V, VOL = 0 V

C VOH = 10 V, VOL = 0.1 V

D VOH = 8.5 V, VOL = 0.1 V

Q4: If the resistor in the Schmitt trigger astable multivibrator is a variable resistor, what part of the output voltage waveform will change when the resistance is changed?

A the shape of the waveform

B the period of the waveform

C the amplitude of the waveform

D none of the above

Q5: When extremely critical timing is required, a quartz crystal can be used.

A False

B True

Q6: In the 74121, which is nonretriggerable, any triggers that come in before the end of the timing cycle are ignored.

A True

B False

Q7: A comparator simply outputs a HIGH or LOW based on a comparison of the voltage levels at its input.

A True

B False

Q8: The 74S124 TTL chip is a voltage-controlled oscillator that will generate a specific frequency at Vout.

A True

B False

Q9: A single Schmitt trigger inverter is all that is needed to build a simple astable multivibrator.

A False

B True

Q10: The bistable multivibrator is an R-C flip-flop.

A False

B True