PSI Previous Years Solved Sample Placement Papers
-
Out of the following operators (
^,*,+,&,$), the one having the highest priority is?
(a) +
(b) $
(c) ^
(d) &
Answer: (c)
Explanation: According to the infix-to-prefix algorithm, exponentiation (^) has the highest priority among the given operators. -
Out of the following operators (
|,*,+,&,$), the one having the lowest priority is?
(a) +
(b) $
(c) |
(d) &
Answer: (c)
Explanation: Logical OR (|) has the lowest precedence among the given operators, as defined in the infix-to-prefix algorithm. - The principal evil in today's society is selfishness. Everywhere we see people, who are concerned only with themselves. Personal advancement is the only motivating force in the world today. This does not mean that individuals are not willing to help one another; on the contrary, _________. But, these are only short-term occurrences which ultimately serve our long-term goal of personal gain. To fill in the blank in the above passage, select one of the options from the below mentioned options:
A. we are always trying to undermine others endeavors
B. my uncle Jeremy used to help me with my homework
C. no one can be trusted, not even close friends
D. there are many occasions when we graciously offer our assistance
Answer: D - Virus M helps in controlling the population of gnats; they manage to do this by killing the moth's larvae. Though the virus is always present in the larvae, it is only every six or seven years that the virus seriously decimates the numbers of larvae, greatly reducing the population of the gnats. Scientists are of the opinion that the gnats, usually latent, are activated only when the larvae experience biological stress. In case the above mentioned scientists are correct, it can be inferred that the decimation of gnat populations by the virus M could be most probably activated by the following conditions?
A. A shift by the gnats from drought areas to a normal area occupied by them
B. The resultant stress from defoliation of trees attacked by the gnats for the second consecutive year.
C. Attacks on the larvae by all kinds by parasitic wasps and flies.
D. Starvation of the gnat larvae due to over population.
Answer: D - A survey recently conducted revealed that marriage is fattening. The survey found that on an average, women gained 23 pounds and men gained 18 pounds during 13 years of marriage. The answer to which among the following questions would be the most appropriate in evaluating the reasoning presented in the survey?
A. Why is the time period of the survey 13 years, rather than 12 or 14 ?
B. Did any of the men surveyed gain less than 18 pounds during the period they were married ?
C. How much weight is gained or lost in 13 years by a single people of comparable age to those studied in the survey ?
D. When the survey was conducted were the women as active as the men?
Answer: C - Experts in the field of forestry are now questioning the policy of attempting to extinguish all forest fires instead of allowing them to run their course and die out on their own. The study of forest fires indicates that in the long run, forest fires may in fact, be beneficial to the ecology as a whole. Among the following, which statement would logically follow from one of the observations referred to in the passage above?
A. Most of the forest fires are causes due to natural reasons like lightning rather than as a result of human carelessness
B. Every year the number of people dying as they attempt to fight forest fires is greater than the number of people who would have died or suffered injury if the fires were allowed to run their own course.
C. Accumulation of highly flammable dead brushwood and timber, which could lead to massive uncontrollable fires is prevented by frequent small forest fires.
D. The animal and plant life destroyed by forest fires seldom represents endangered species
Answer: C - Five educational films A, B, C, D, & E are to be shown to a group of students. The films are to be shown in a particular order, which conforms to the following conditions: A must be shown earlier than C. B must be shown earlier than D. E should be the fifth film shown. Which among the following is an acceptable order for showing the educational films?
A. A, C, B, D, E
B. A, C, D, E, B
C. B, D, C, A, E
D. B, D, E, A, C
Answer: D - Pharmaceutical firms are now engaged in the production of analogues of endorphins, peptides, which are thought to transmit messages among brain cells, which bring about pain relief. The pharmaceutical firms claim that the analogues, when injected into the bloodstream, will lead to effective and longlasting pain relief by increasing the action of peptides already present in the brain. The claims put forth by the pharmaceutical firms would be considerably weakened if it were true that
A. Compared to the other types of neurotransmitters present in the brain, endorphins remain active for a longer time period
B. Certain peptides have been traced in parts besides the brain, like the alimentary canal and the skin
C. It is easier and cheaper to produce analogues of peptides in the laboratory than the peptides themselves.
D. Analogues of peptides, which are found naturally in the body are often filtered from the blood before the blood circulates in the brain.
Answer: D - Which among the following statements is the most probable taking into consideration the source and the degree of seriousness with which they are uttered?
A. Examiner: "The exam will be taken under the honor system: the professors have the honor, and the students have the system."
B. Banker: "The low percentage of Jews in this bank has nothing to do with discrimination. Jews don't seem to be interested in banking."
C. Book cover: "This book is sure to become the last word in its field."
D. Politician: "My opponent has an impeccable political and personal record."
Answer: D - Tom: It is likely that Greece will be humiliated in the Cyprus affair. In case she fights Turkey, she will be defeated in battle; whereas if she doesn't fight, letting Turkey win, she will be humiliated, as she would then seem impotent. Sarah: In that case Greece could always call the Soviet Union to her aid. Sarah attacks Tom's argument by:
A. attacking Tom on a personal level.
B. attacking Tom's method of reasoning
C. siding with Greece
D. citing an alternative which was overlooked by Tom
Answer: D