This article looks into the competence of second language acquisition investigating that how a language learner does learn English as a second language effectively by using his own abilities.Many studies have examined the function of Self-Efficacy in academic achievement, though as Pajares (2000) mentioned the relation of language achievement and Self-Efficacy has not been studied well and there has been small research in this regard. This made the researcher to investigate the relationship between Pakpattan ESL learners' language achievements and their Self-Efficacy.
 It also studies the variations of ESL learners’ Self-Efficacy and their majors. Besides, it explores the differences between ESL learners' majors and their language achievements. Population of this study was 200 ESL learners of The University of Lahore Pakpattan campus but 60 ESL learners from different departments of The University of Lahore Pakpattan campus selected for the sample of present study in order to measure ESL learners' language proficiency. Different types of tests applied for its measurement.
 
 A questionnaire was prepared and conducted. Computer statistical program SPSS XXII was used for statistics. Literature were reviewed and the work cited mentioned as well.
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