These are some examples of not having conceptual clarity. The first one is an example of byhearting algorithm without even understanding what it is doing. Those who do this typically scores less than 30 or 40 in GATE. Second one is more common among GATE aspirants. Not going behind “why”. Such people might score 40+ or even 50+ but probably wont go beyond 60. Those who does the third – needs all the luck in the world even to go above 20.